David K. Joyce

Rare Minerals

Unusual and rare minerals that I felt would be better here than in some other category! :)

All prices in Canadian dollars. For payment in US$, deduct 18% or multiply by 0.82.

Click on any of the following thumbnails to view a larger image of the specimen.

Item #20931 Thomsenolite, Siderite, Sphalerite, Ralstonite 12.4x9.0x7.5 cm Largest Crystal Size: 6mm $260.00 Ivigtut Deposit Ivittuut, Arsuk Fjord Greenland There are cavities all over this specimen that are lined with superb, elongated, terminated thomsenolite crystals. Of course as is usually the case, the thomsenolite is white but has a light coating of iron oxide that give the specimen its classic look. Matrix appears to me massive thomsenolite with a few small siderite and sphalerite crystals embedded in it. As well, there are small cube-octahedral ralstonite crystals on the thomsenolite crystals, inside the vugs. We don't seem much of this material around any more!	Item #21521 Arsenohauchecornite 8.8x5.5x2.4 cm Largest Crystal Size: n/a $65.00 Vermilion Mine Denison Township Ontario, Canada There are two areas of aresnohauchecornite embedded in chalcopyrite at one end of this matrix. Affixed arrows make them easy to see. Rare mineral from the type locality!	Item #21522 Arsenohauchecornite 7.0x4.4x4.7 cm Largest Crystal Size: n/a $75.00 Vermilion Mine Denison Township Ontario, Canada A nice patch of rare arsenohauchecornite associated with chalcopyrite. Rare mineral from the type locality.	Item #27109 Galkhaite 4.8x2.7x2.6 cm Largest Crystal Size: 0.5mm $65.00 Getchell Mine Humboldt County Nevada, USA This specimen has a number of sharp, cubic crystals of galkhaite on it. Little red arrows have conveniently been placed on the piece to better enable you to find and see them with your loupe or 'scope. Nice specimen of a rare mineral1
Item #21959 Raite 3.8x2.8x2.0 cm Largest Crystal Size: micro $45.00 Indian Mountain Kola Peninsula Russia There are many open spaces in this matrix that reveal beautiful crystal sprays of the rare Sodium-manganese-titanium silicate raite. There are supposed to be zorite crystals(?) in the cavities as well but I cannot recognize them. Maybe you can?! Very nice raite!	Item #21937 Carparthite 7.0x6.0x5.1 cm Largest Crystal Size: 6mm $65.00 Picacho Mine San Benito Co. California, USA This specimen has some openings that contain yellowish crystals of this unusual mineral that is composed of just carbon and hydrogen! Some nice crystals here!	Item #21945 Strengite 4.3x2.5x1.6 cm Largest Crystal Size: 0.5mm $35.00 Indian Mountain Cherokee County Alabama, USA Beautiful well formed crystals are present both on the darker oxide matrix and as thicker covering on the other side of the specimen. Not all crystals are undamaged but there are many that are perfect and excellent for photography!	Item #21955 Felsobanyaite, Gypsum 3.7x2.8x2.8 cm Largest Crystal Size: n/a $40.00 Chickerell Dorset England OK, it is not pretty! It IS unusual, though! White aggregates of this unusual aluminum sulfate mineral intermixed with elongated growths of gypsum. Was labelled originally as "basaluminite", which is a pseudonym for felsobanyaite. Unusual!
Item #21961 Ussingite 4.7x4.3x3.2 cm Largest Crystal Size: n/a $45.00 Mt. Punkurauj Chibiny Massif, Kola Peninsula Russia A fragment of massive ussingite ranging from light mauve to purple. Rich!	Item #21991 Tellurobismuthite 5.6x5.1x3.5 cm Largest Crystal Size: 2mm cleavage $45.00 Fyresdal Norway Lots of bright, lustrous cleavages of this unusual telluride scattered throughout this quartz matrix. Rich!	Item #21992 Brewsterite, Baryte 3.5x3.4x2.2 cm Largest Crystal Size: 2mm $35.00 Strontian Argyllshire Scotland This thick plate has its top covered with white crested baryte crystals which have a generous sprinkling of sharp brewsterite crystals. There is sphalerite or wurtzite embedded in the matrix. From the type locality!	Item #22167 Clinoptilite-Ca 3.7x3.7x2.3 cm Largest Crystal Size: 2mm $45.00 Succor Creek Oregon, USA This geode-like, quartz nodule is hollow and completely lined with tabular, sharp, gemmy clinoptilite crystals. Excellent!
Item #22548 Sarabauite, Stibnite 6.2x4.5x1.7 cm Largest Crystal Size: n/a $55.00 Sarabau Mine Sarawak, Borneo Malaysia Rich, red sarabauite is associated with metallic stibnite, both being embedded in calcite and wollastonite. This is the type locality for this unusual antimony mineral!	Item #22676 Jamborite, Siderite 11.8x7.8x3.8 cm Largest Crystal Size: 3mm $55.00 Sterling Mine Antwerp New York, USA Sharp, acicular pseudomorphs of jamborite after millerite are tucked away here and there in interstices of this wide, shallow siderite crystal pocket. Classic Sterling Mine! R	Item #22797 Dawsonite, Calcite 16.0x6.0x3.6 cm Largest Crystal Size: 7mm $55.00 St. Bruno Quebec, Canada Masses of dawsonite fibers are present in fracture in this apparent limestone matrix. openings in the rock are lined with calcite rhombs. Unusual! R	Item #25064 Rosenbuschite, Eudialyte, Aegirine 7.0x4.0x4.8 cm Largest Crystal Size: n/a $75.00 Norra Karr, Sweden Some 1-2mm orangey-brown crystals of rosenbuschite are embedded in this nepheline-eudialite-aegirine rock. Rare!
Item #25968 Bayldonite, Mimetite 2.7x2.2x1.6 cm Largest Crystal Size: micro $45.00 Gold Hill Mine Toole County Utah, USA Lots of light green bayldonite crystals associated with white mimetite crystals on this gossanous matrix. Very good!	Item #25993 Boltwoodite, Calcite 2.9x2.4x2.3 cm Largest Crystal Size: 3mm $75.00 Swapkomund Namibia A couple of sprays of deep-yellow boltwoodite span this calcite crystal lined vug in massive calcite. Very nice example!	Item #26394 Klebelsbergite, Sulphure, Stibnite 6.9x4.7x2.6 cm Largest Crystal Size: micro $65.00 Pereta Mine Grosetto, Tuscany Italy This specimen is predominately stibnitre crystal sections with openings between the stibnite crystals and, also, the matrix. In these openings are lots of yellow, gemmy crystals of native sulphure. As well, often there are whitish sprays of acicular klebelsbergite crystals. Excellent!	Item #26445 Fluor-buergerite 3.6x3.0x2.1 cm Largest Crystal Size: 9mm $65.00 San Luis Potosi Mexico Very sharp crystals of this relatively rare tourmaline group member seem to be embedded in red, common opal on volcanic matrix. The crystals are dark brown and have very sharp faces. Excellent example!
Item #27655 Kroenkite 4.8x3.1x2.2 cm Largest Crystal Size: 2mm $65.00 Chuquicamata Chile This specimen is mostly composed of massive ocean-blue kroenkite but at one end there is a cavity with some well formed crystals in it. We don't see this mineral much any more!	Item #27664 Hannebachite 3.4x2.9x1.8 cm Largest Crystal Size: micro $65.00 Hannebacher Ley Eifel Germany This dark matrix has a couple of vugs that contain very thin, platy tiny crystals of hannebachite. Rare stuff!	Item #27801 Macfallite, pyrolusite 9.2x8.2x4.2 cm Largest Crystal Size: 2mm $75.00 Manganese Mine Copper Harbor Michigan, USA This specimen is a mass of pyrolusite and calcite with lots of areas of red-brown macfallite in the pyrolusite and calcite. Some of the calcite could be etched away to reveal really nice macfallite crystals. There are already some open vugs of the minerals with excellent crystals. Rich!	Item #27802 Macfallite, Pyrolusite 9.7x9.0x5.0 cm Largest Crystal Size: 2mm $75.00 Manganese Mine Copper Harbor Michigan, USA Lots of macfallite in this specimen of calcite, macfallite and pyrolusite. If you etch some of the calcite off with vinegar or weak acid, there will be loads of nice macfallite crystals to view.
Item #27805 Neotocite, Pyrolusite 7.6x7.1x5.7 cm Largest Crystal Size: n/a $75.00 Taylor Mine Alberta Michigan, USA This specimen shows a quartz bed or vein that passes through iron-manganese oxides. The oxides are laced through with seams of thick, dark brown neotocite. Interestingly, at one end of the specimen there are pyrolusite crystals embedded in the neotocite.	Item #27806 Neotocite 9.0x6.0x4.7 cm Largest Crystal Size: n/a $65.00 Taylor Mine Alberta Michigan, USA This is a fragment of bedded manganese-iron oxide and quartz mineralization. Particularly at one end, there is lots of dark brown, glassy-resinous neotocite.	Item #27808 Neotocite, Pyrolusite 7.8x5.0x5.3 cm Largest Crystal Size: n/a $55.00 Taylor Mine Alberta Michigan, USA This specimen shows a band of dark quartz passing through iron-manganese oxides. The oxides on either side of the quartz have been partially altered to neotocite. Interestingly, the neotocite on one side has pyrolusite crystals cutting through it. Interesting!	Item #27818 Galena, Seligmannite, Tetrahedrite, Quartz 8.0x5.0x5.8 cm Largest Crystal Size: g-27mm, sel0.5mm $75.00 La Palomo Mine Huachocolpa, Huancavelica Peru A large cluster of cube-octahedral galena crystals encrusted with tiny quartz and sharp, prismatic seligmannite crystals. The seligmannite crystals sparkle and are easily seen but best looked at with a loupe or microscope. Rare mineral!! Also some small, sharp, tetrahedrite crystals.
Item #27887 Bustamite 5.2x4.5x3.4 cm Largest Crystal Size: 38mm $75.00 Broken Hill Mine Broken Hill, NSW Australia This specimen is composed of a bunch of brownish bustamite crystals all held together by white calcite. I expect most are touching somewhere inside the calcite. The crystals have good faces with some very flat and sharp while others rounded as is often the case with crystals formed in a calcite stew. Interesting specimen from a world-class mine-orebody!	Item #27895 Clinoatacamite, Gypsum, Quartz 7.1x6.3x3.9 cm Largest Crystal Size: 2mm $85.00 Lily Mine Pisco Umay Peru Here is an exemplary specimen of this relatively rare mineral. The cavity in the top of this specimen is a quartz crystal-lined cavity that is sprinkled liberally, and clustered heavily at one end, with dark, emerald-green clinoatacamite crystals. These crystals are very sharp and excellent for the mineral. As well, there are some gypsum crystals in the cavity. Displays well.